Liquid-meter.



W. LEDOUX. LIQUID METER. APPLICATIUN FILED .TA 1T.24, 1910.

Patented Jan. 14,1913.

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Jenn vv. Lezioni, or SWA RTHMORE, PENNSYLVANIA.'

LQUID-METEB.

Speecaton of Letters Patent.

Patented J an. 14, 1913.

To CLI/1 ywhom t may concern Be it known that l, JOHN W. Lnno'ux, a citizen of the United States, residing at Swarthmore, in the county of lelavare and State of Pennsylvania, have inve l, cer tain lmprovements in Liqui-l-l of Awhich the following is a speciiication.

This invention is a meter having improved means for diiteren* ing .liquid pressures and therefrom integrating and re cording the iow ot the liquid. ln the preferred constructionembodying my invention, a ioat is formed, balanced and connected to move, with changes in the rate of flow of the liquid to be measured, so that the movement and the change of rate shall be in a simple ratio and this movement is communicated to integrating and recording mechanism.

The characteristics ot' my improvements fully disclosed' in the following descrip-A tion and the accompanying drawing in illustration thereof. y

The drawing represents a partial sectional elevation of apparatus embodying my improvements.

As illustrated, the

conduit 1,y provided with a Venturi section 2, has its normal. section 1 connected by a Itube 3 with the top of a pressure chamber 4 and the throat 2 of its Venturi, section connected by a tube 5 with the interior of a float 6 (having the form of an inverted vessel with thin Walls) in 'the chamber e; the tube V5 passing through the closed bottom of the chamber and the open bottom of the float 6 toa point above in the chamber' el, rises.

l A chamber 7, containing mercury, has its top connected with the top of the chamber e by the casing 8. A peculiarly shaped float 9, Within the chamber 7, is connected with the float G by the cords 10 and 11 connected With the sheave 4'1Q which is revoluble in the casing S. The sheave 12 is fixed on a Ashaft 13 which is journaled in the Walls of the casing 8 and has :fixed thereon, exterior to the casing, a sheave 14. Connected with the sheave 11i is a. cord 15 having a svviveled connection 15 with one end of a rod 16, wn h is revoluble in and movable longitu linally through bearings 17 land 18, the outer end of the rod being connected by a swivel 19 with tho cord4 19 which passesover e, she-avery) and carries a 'adapted to be -and revolving the shaft- The shaft. 16 is movable longitudinallyv A'dislr 22 is fixed on the shaft 16 and is moved thereby between the apex and the base of a cone 23 with the surface of which it makes contact,'the cone be-l ing revolved 'at a constant rate by a clock 24 through the disk.

through and revolves (by means of a groove 25 and keyo) a gear Wheel 26, 'which is journaled in the bearing 17 and revolves a gear train 27 of a. register 28 for indicating the total flow.

A. scale 29, carried by the bearing 18, coacts with the disk 22 to indicate the rate of flow.

A cylinder 30, adapted for carrying a sheet SO for receiving a record, is revolved at a constant rate by the clock Q4. Record sheet 30/ carried bythe cylinder is acted upon by a marker 31 which is 'movable on a stationary guide 33 parallel'toftlie axis of the cylinder. An arm 34 is provided with a collar 35 Within which the rod 16 revolves,

lixed to the rod whereby the longitudinal fixed to a collar 82 collars 36- being movement ot' the latter is communicated to"v the arm. The reduced lower end of the arm 34 engages and moves through the collar Consequently the longitudinal movement of therod 16 translates the arm 34e, the collar 32 and the marker 31, which makes a record on the recording sheet shove.l

ing the tloiv,

In operation, when there is no flow of the liquid in the conduit, the pressure (as of Water or other uid lighter than mercury) communicated through the tube 3 to the surface of the mercury in the chamber Il exterior tothe float 6 Will be equal to the pressureecommunicatcd through the tube 5 to the surface ot 4the mercury in the fioat 6, so that the mercury in the chamber 4 Within and without the float same level. As the pressure of the liquid in the chamber l upon the top of the float 6 is substantially the same per unit of ,area as the oppositely acting pressure within the float, the latter will be pushed down into the mercury only slightly by the excess. of pressure due to the slightly greater area of the exterior than of the interior of the closed top of the float. The Weight of the ioat 6 is counterbalanced primarily by the variable force exerted by the float 9 immersed to a greater or less extent in mercury and by 6 will stand at the i the constant force exerted by the Weight 21 acting through the mechanism connecting it with the lsheave 14. lWith substantially equal pressures within and Without the float 6, it exerts the minimum tension on the cordl 11 connecting it with the sheave 14, the flo-'at 9 falls to its position of greatest submergence in the mercury in the chamber 7, and. the shaft 16, acting under the influence of ,the weight 21, moves the disk 22 to the apex ofthe cone 23 and the marker 31 to tlie datum line 30 indicating no ilow. ln this position the disk receives no motion from the constantly rotating cone 28, consequently the register 2S is inactive. As the 'llow in the conduit 1 rises, greater pressure is communicated through the tube 3 than through the tube 5, the pressure exterior to the lioat 6 is greater per unit of area than the interior 'pressure (so that the surface of the mercury within the float rises as that without falls) and the float moves downward against the increasing resistance of theloat 9 as it is caused torise 'trom the mercury Vin the chamber 7. The shape of the loat 9 is such that the force with which it acts against the float 6 varies in a simple proportion with relation to the rate of flow, so that the `movement will be a simple proportion of the changefin the rate ot flow in the conduit. Consequently the graduations' yof the scale 29 are uniform and the position of the disk 22 withI relation thereto will indicate the rate of flow. As the movement of the lloats, .due to the rise in flow in the conduit, effects the movement of the disk 22 a proportionate distance from the apex of the cone 23 toward its base, the disk and the mechanism by which it is Vconnected with the register are revolved at la rate which isia function of the rate of ilow, hence the register will indicate the total flow. The movement of the floats will also effect the movement of the marker 31 a distance which is a simple proportion of the distances traveled byA the floats, consequently 'the record made by the markeriipon the constantly movingsheet- 30carried by the cylinder 30 will indicate the flow at different periods.

Having described myl invention, IA claim:

'1. In a liquid meter,in combination with a conduit adapted for conveying a liquid, a chamber, a" hollow loat in said chamber, said oat having an opening adapted to be sealed by a liquid in said chamber, meansfor communicating pressure from the liquid in said conduit to the interior of said chamber exterior to said float, means .for coinmunicatingpressure from liquid in said conduit to the interior of said loat, and counter-balancing means offering ayariablc re sistance to the movement of said float whereby its :movements due to changes in the rate of tlow in said conduit are a simple proper-- tion of the changes 'in suoli rate of llow.

2. ln a liquid meter, in combination with a conduit adapted for conveying :i

liquid to be measured, a chamber, a hollow float in said chamber, said iloat having an opening adapted to be sealed by a liquidA heavier than that to be measured, means comprising a shaft with which said tioat is connected, a second chamber adapted -for containing a liquid, 4a float in said second chamber adapted to he submerged to a greater or less extent by liquid thereinfsaid second float being connected with said means, to control the movements of said float first-named, mechanism connected with said ymeans and reciprocating .under control ofisaid floats, a revoluble traction member by said heavier liquid, a {loa-t in the other `of said chambers, a journaled sheave in said casing, means whereby said floats are con` nected with said sheave, a duct whereby liquid pressure is communicated from said conduit to said chambers above said heavier liquid exterior to said hollow float and a duct whereby different liquid pressure is communicated from said conduit to the interior ofsaid hollow float above said heavier liquid.

ln Witness whereof )i have-hereunto set my name this 22 day oliaanuary, 1910, in the presence ot the subscribing witnesses.

. JUHN 1V. lili-DOUX. Witnesses :VL

Jos. G.' Danni', Jr., Romair JAMES EARLY.

Urpies of this patent may be obtained for tive cents each. by addressing the "lommissoner of Patente. Washington, D. C. 

